EP 2156152 B1 20130227 - DETECTION OF AN ABNORMAL SIGNAL IN A COMPOUND SAMPLED SIGNAL
Title (en)
DETECTION OF AN ABNORMAL SIGNAL IN A COMPOUND SAMPLED SIGNAL
Title (de)
DETEKTION EINES ABNORMEN SIGNALS IN EINEM ZUSAMMENGESETZTEN ABGETASTETEN SIGNAL
Title (fr)
DÉTECTION D'UN SIGNAL ÉCHANTILLONNÉ COMPOSÉ
Publication
Application
Priority
- GB 2008001249 W 20080410
- GB 0709044 A 20070511
Abstract (en)
[origin: WO2008139134A2] According to an aspect of the present invention, there is provided a method of detecting an abnormal signal in a compound sampled signal recorded in the time domain, the method comprising: dividing the sampled signal recorded in the time domain into a plurality of sample segments; transforming each of the plurality of the sample segments from the time domain into the frequency domain to determine a plurality of transformed sample segments, each transformed sample segment having a plurality of frequency points, each frequency point having an amplitude associated with a certain frequency; for a frequency point in a given transformed sample segment, determining a ratio by dividing the amplitude of the frequency point by a value indicative of an average of the amplitudes of the frequency points at the same frequency across a plurality of transformed sample segments; repeating the determination of a ratio for a plurality of frequency points in each transformed sample segment to determine a plurality of ratios for each transformed sample segment; repeating the determination of a plurality of ratios for a plurality of transformed sample segments; and using the ratios to detect the abnormal signal in the compound sampled signal.
IPC 8 full level
G01H 3/08 (2006.01)
CPC (source: EP US)
G01H 3/08 (2013.01 - EP US); G01R 31/08 (2013.01 - US); G06F 15/00 (2013.01 - US)
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MT NL NO PL PT RO SE SI SK TR
DOCDB simple family (publication)
WO 2008139134 A2 20081120; WO 2008139134 A3 20090430; EP 2156152 A2 20100224; EP 2156152 B1 20130227; EP 2156152 B8 20130403; GB 0709044 D0 20070620; US 2010106441 A1 20100429; US 2013096855 A1 20130418; US 8326557 B2 20121204; US 9772368 B2 20170926
DOCDB simple family (application)
GB 2008001249 W 20080410; EP 08736920 A 20080410; GB 0709044 A 20070511; US 201213693849 A 20121204; US 61564309 A 20091110